mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
9cf0669746
The user can request to enable snooping control through VT-d page table. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
34 lines
738 B
C
34 lines
738 B
C
#ifndef _DMA_REMAPPING_H
|
|
#define _DMA_REMAPPING_H
|
|
|
|
/*
|
|
* VT-d hardware uses 4KiB page size regardless of host page size.
|
|
*/
|
|
#define VTD_PAGE_SHIFT (12)
|
|
#define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT)
|
|
#define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT)
|
|
#define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK)
|
|
|
|
#define DMA_PTE_READ (1)
|
|
#define DMA_PTE_WRITE (2)
|
|
#define DMA_PTE_SNP (1 << 11)
|
|
|
|
struct intel_iommu;
|
|
struct dmar_domain;
|
|
struct root_entry;
|
|
|
|
extern void free_dmar_iommu(struct intel_iommu *iommu);
|
|
|
|
#ifdef CONFIG_DMAR
|
|
extern int iommu_calculate_agaw(struct intel_iommu *iommu);
|
|
#else
|
|
static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
extern int dmar_disabled;
|
|
|
|
#endif
|